Étude De L’évaporation De La Nappe Phréatique De La Région De Ouargla

Résumé: The majority of developed lands in arid and semi-arid areas of Algeria are based on highly mineralized water table, which level is (0-1.5 m) close to the soil surface. Such levels of closeness to the soil surface, combined with the existence of highly severe climatic conditions, have stimulated the process of evaporation of water table, thing which largely contributes to salinization of soil and degradation of the environment. The analysis of research works made for determination of the phenomenon of evaporation of water table in the region of Ouargla had shown that evaporation decreases as water table is far from the soil surface. Studies Results are showing that water table evaporation reaches its maximum rate once table water is above 0.6 m near soil surface and its minimum rate when this latter is below 1.7 m. The subject of our research consists in determining the relationship between the water table evaporation and its depth depending on the soil texture.

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